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RISAn Improved Particle Impact Model by Accounting for Rate of Strain and Stochastic Rebound
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A methodology for informing physics-based impact and deposition models through the use of novel experimental and analysis techniques is presented. Coefficient of restitution (CoR) data were obtained for Arizona Road Dust ...
Deposition on a Cooled Nozzle Guide Vane With Nonuniform Inlet Temperatures
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: External deposition on a slot film cooled nozzle guide vane, subjected to nonuniform inlet temperatures, was investigated experimentally and computationally. Experiments were conducted using a fourvane cascade, operating ...
A Global Approach to Turbomachinery Flow Control: Passage Vortex Control
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A flow control scheme was implemented in a lowpressure turbine cascade that simultaneously mitigated profile and endwall losses using midspan vortex generator jets (VGJs) and endwall suction. The combined system had an ...
Computational Simulation of Deposition in a Cooled High-Pressure Turbine Stage With Hot Streaks
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Ash particle deposition in a high-pressure turbine stage was numerically investigated using steady Reynolds-averaged Navier-Stokes (RANS) and unsteady Reynolds-averaged Navie-Stokes (URANS) methods. An inlet temperature ...
A Simplified Injection Model for Variable Area Turbine Fluidic Throttling
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Previous studies have demonstrated the effectiveness of using fluidic actuators to throttle the flow through a nozzle guide vane, enabling a variable area turbine (VAT) with no moving parts. A simplified model was developed ...
Parametric Optimization of Unsteady End Wall Blowing on a Highly Loaded Low Pressure Turbine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Efforts to reduce blade count and avoid boundary layer separation have led to lowpressure turbine airfoils with significant increases in loading as well as frontloaded pressure distributions. These features have been ...
The Effect of Freestream Turbulence on Deposition for Nozzle Guide Vanes
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An evaluation of the effect of freestream turbulence intensity on the rate of deposit accumulation for nozzle guide vanes (NGVs) was performed using the turbine reacting flow rig (TuRFR) accelerated deposition facility. ...
The Effect of Acoustic Excitation on Boundary Layer Separation of a Highly Loaded LPT Blade
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An experimental investigation of the effect of acoustic excitation on the boundary layer development of a highly loaded lowpressure turbine blade at lowReynolds number is investigated. The aim of this work is to study the ...
Secondary Flow Loss Reduction Through Blowing for a High Lift Front Loaded Low Pressure Turbine Cascade
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Efforts to increase individual blade loading in the low pressure turbine have resulted in blade geometries optimized for midspan performance. Many researchers have shown that increased blade loading and a frontloaded ...
Exploitation of Subharmonics for Separated Shear Layer Control on a High Lift Low Pressure Turbine Using Acoustic Forcing
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The mechanism of separation control by sound excitation is investigated on the aftloaded lowpressure turbine (LPT) blade profile, the L1A, which experiences a large boundary layer separation at low Reynolds numbers. Previous ...